This taxon is Not Recognised as a species by BirdLife International.
Ceyx erithaca (del Hoyo and Collar 2014) was previously split as C. erithaca and C. rufidorsa following Sibley and Monroe (1990, 1993), with gender agreement of erithaca following David and Gosselin (2002a).
BirdLife International (2016) Species factsheet: Ceyx rufidorsa. Downloaded from http://www.birdlife.org on 03/12/2016. Recommended citation for factsheets for more than one species: BirdLife International (2016) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 03/12/2016.